Potato Common Scab: a Review of the Causal Pathogens, Management Practices, Varietal Resistance Screening Methods, and Host Resistance

Braun, Sarah; Gevens, A. J.; Charkowski, Amy O.; Allen, Christina R.; Jansky, Shelley

doi:10.1007/s12230-017-9575-3

Cited by 83 publications

(43 citation statements)

References 127 publications

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“…Previous studies have reported heritability estimates for these traits; however, differences in the nature of the genetic materials (diploid vs. tetraploid, hybrids vs. genotypes) and of the environmental conditions (natural vs. induced infection) makes the comparisons across studies difficult ( Nelson 1978 ; Braun et al 2017b ). For instance, Haynes and Christ (1999) reported much higher heritability estimates for late blight resistance (0.8), but this study was based on diploid hybrids.…”

Section: Discussionmentioning

confidence: 99%

“…For common scab, previous heritability estimates are also highly variable, depending on the genetic material and the environmental conditions. For instance, using diploid potatoes derived from a cross between wild relatives ( S. phureja × S. stenotonum ) and cultivated potatoes (di-haploid S. tuberosum × S. chacoense ), Haynes et al (2009) and Braun et al (2017b) reported broad sense heritability estimates ranging from 0.18 to 0.72 for different environments. However, studies involving tetraploid potatoes have reported higher heritability estimates with values ranging from 0.32 to 0.93 ( Haynes et al 1997 ; Bradshaw et al 2008 ; Tai et al 2009 ).…”

Section: Discussionmentioning

confidence: 99%

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Genomic Selection for Late Blight and Common Scab Resistance in Tetraploid Potato (Solanum tuberosum)

Enciso-Rodríguez¹,

Douches²,

Lopez‐Cruz³

et al. 2018

G3 Genes|Genomes|Genetics

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Potato (Solanum tuberosum) is a staple food crop and is considered one of the main sources of carbohydrates worldwide. Late blight (Phytophthora infestans) and common scab (Streptomyces scabies) are two of the primary production constraints faced by potato farming. Previous studies have identified a few resistance genes for both late blight and common scab; however, these genes explain only a limited fraction of the heritability of these diseases. Genomic selection has been demonstrated to be an effective methodology for breeding value prediction in many major crops (e.g., maize and wheat). However, the technology has received little attention in potato breeding. We present the first genomic selection study involving late blight and common scab in tetraploid potato. Our data involves 4,110 (Single Nucleotide Polymorphisms, SNPs) and phenotypic field evaluations for late blight (n=1,763) and common scab (n=3,885) collected in seven and nine years, respectively. We report moderately high genomic heritability estimates (0.46 ± 0.04 and 0.45 ± 0.017, for late blight and common scab, respectively). The extent of genotype-by-year interaction was high for late blight and low for common scab. Our assessment of prediction accuracy demonstrates the applicability of genomic prediction for tetraploid potato breeding. For both traits, we found that more than 90% of the genetic variance could be captured with an additive model. For common scab, the highest prediction accuracy was achieved using an additive model. For late blight, small but statistically significant gains in prediction accuracy were achieved using a model that accounted for both additive and dominance effects. Using whole-genome regression models we identified SNPs located in previously reported hotspots regions for late blight, on genes associated with systemic disease resistance responses, and a new locus located in a WRKY transcription factor for common scab.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Genomic Selection for Late Blight and Common Scab Resistance in Tetraploid Potato (Solanum tuberosum)

Enciso-Rodríguez¹,

Douches²,

Lopez‐Cruz³

et al. 2018

G3 Genes|Genomes|Genetics

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“…Common scab, caused by Streptomyces Waksman & Henrici species [103,104], and Southern Sclerotium root rot, caused by Athelia rolfsii (Curzi) Tu & Kimbr. [105] are additional important soilborne diseases of table beet but are limited distribution in New York [106], and more commonly observed in diversified fresh market production systems.…”

Section: Root Diseasesmentioning

confidence: 99%

“…The disease is prevalent in diversified farms in eastern and northern New York where soil pH is above 5.2. In table beet, there is no known tolerance between cultivars and careful monitoring of soil pH, avoiding low soil moisture early in crown development, and crop rotation to nonsusceptible species are the most important management strategies [104]. Initial symptoms of Sclerotium root rot in table beet fields appear as wilted plants but rapidly progresses to severe root rot and may result in substantial post-harvest decay [105].…”

Section: Root Diseasesmentioning

confidence: 99%

Challenges and Prospects for Building Resilient Disease Management Strategies and Tactics for the New York Table Beet Industry

et al. 2018

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Abstract:The New York table beet industry is expanding and has unique challenges to minimize crop loss in both conventional and organic production. Diseases may reduce plant population density and increase heterogeneity in a stand, reduce the duration of time foliage is healthy, and decrease the yield of marketable roots. Rhizoctonia solani Kuhn and Pythium ultimum Trow are dominant in the pathogen complex affecting crop stand and root health. Cercospora leaf spot (CLS) caused by the fungus, Cercospora beticola Sacc

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“…That is, in order to map QTL for resistance to a disease, the environment pathogen pressure should be such that the genotypes can express their genetic merit and be phenotypically evaluated. In the case of potato common scab, the variation present within pathogenic Streptomyces spp., and other soil variables, such as moisture content and pH, are known to influence the severity of scab (Braun et al, 2017b). The distribution of different Streptomyces spp.…”

Section: Discussionmentioning

confidence: 99%

Quantitative trait locus mapping for common scab resistance in a tetraploid potato full-sib population

Pereira¹,

Mollinari

et al. 2020

Preprint

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Despite the negative impact of common scab (Streptomyces spp.) to the potato industry, little is known about the genetic architecture of resistance to this bacterial disease in the crop. We evaluated a mapping population (~150 full-sibs) derived from a cross between two tetraploid potatoes ('Atlantic' × B1829-5) in three environments (MN11, PA11, ME12) under natural common scab pressure. Three measures to common scab reaction were assessed, namely percentage of scabby tubers, and disease area and lesion indices, which were highly correlated (>0.76). Due to large environmental effect, heritability values were zero for all three traits in MN11, but moderate to high in PA11 and ME12 (0.44~0.79). We identified a single quantitative trait locus (QTL) for lesion index in PA11, ME12 and joint analyses on linkage group 3, explaining 22~30% of the total variation. The identification of QTL haplotypes and candidate genes contributing to disease resistance can support genomics-assisted breeding approaches.

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Potato Common Scab: a Review of the Causal Pathogens, Management Practices, Varietal Resistance Screening Methods, and Host Resistance

Cited by 83 publications

References 127 publications

Genomic Selection for Late Blight and Common Scab Resistance in Tetraploid Potato (Solanum tuberosum)

Genomic Selection for Late Blight and Common Scab Resistance in Tetraploid Potato (Solanum tuberosum)

Challenges and Prospects for Building Resilient Disease Management Strategies and Tactics for the New York Table Beet Industry

Quantitative trait locus mapping for common scab resistance in a tetraploid potato full-sib population

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